JPS5953964B2 - wave dissipation block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a spherical wave-absorbing block with hollow holes for wave-dissipating or fish gourd, and the wave-dissipating block.

Previous methods for manufacturing hollow porous spherical blocks include Japanese Patent Application No. 52-9080 (Japanese Patent Application Laid-Open No. 53-96237) and Japanese Patent Application No. 53-77994 (Japanese Patent Application Laid-open No. 55-70).
As described in Publication No. 12), a recess is provided in the cut end of a hemisphere having a certain wall thickness, the reinforcing bars inside the hemisphere are exposed, the two hemispheres are joined so that the reinforcing bars are joined to each other, and then the two hemispheres are joined. The conventional method was to weld the joints of the reinforcing bars or use other fastening fittings, and then fill the recesses with mortar.

This method has the disadvantage that the space in the recess is narrow, making it difficult to weld the reinforcing bars or fasten them using fasteners.

In particular, the welding method was difficult to tighten the upper and lower hemispheres and was expensive.

Another method was to attach an outwardly protruding flange to the cut end of the hemisphere, join the two hemispheres together, and then tighten the protruding flange with bold.

However, this method has the disadvantage that since the flange protrudes outward from the sphere, it cannot become a perfect sphere, and therefore the characteristics of a spherical block are lost.

The present invention relates to a spherical wave-absorbing block with hollow holes that eliminates these drawbacks by making use of the characteristics of a sphere, and that can be manufactured reliably and easily by extremely simply joining and tightening two hemispheres. It is.

To explain this with the help of drawings, Figs. 1 to 3 show an example of the manufacturing method of a spherical wave-absorbing block with hollow holes according to the present invention, and Fig. 1 shows two blocks with a certain wall thickness. This is a front view of a hollow porous spherical block A made by joining the upper and lower hemispheres and tightening them. 1 is a hemisphere with a certain wall thickness.

2 is a circular hole raised toward the center of the sphere in the wall of a hemisphere with a certain wall thickness.

In this example, there is one at the center of the spherical surface of the hemisphere.

The center of the hemisphere is the center 0 (not visible from the front), and the center is on the line where the elevation angle of about 30° with the plane of the cut 3 of the hemisphere intersects the plane of the hemisphere, and six circular shapes are arranged at equal intervals. There are holes, a total of 7 holes.

Therefore, there are a total of 14 holes in one sphere.

2' is the edge of the outer wall surface of the sphere of the hole 2, and 2 is the edge of the inner wall surface.

3 is a joint surface that joins two hemispheres at the cut end of hemisphere 1.

The two hemispheres are superimposed so that their respective holes are symmetrical with respect to the plane 3 of this cut.

4 indicated by a dotted line is a hole through which a bold is passed to fasten the upper and lower hemispheres, and the bold 5 is passed through this hole and tightened to fasten the two hemispheres.

BOLD can sufficiently resist not only tensile force but also rotational force and shear force acting on the joined hemispheres, so the two hemispheres are integrated and a completely hollow porous spherical wave absorbing material is created. Blocks are formed.

6 is a recessed portion in which the nuts and the heads of balls 1 to 1 can be filled with mortar or the like after tightening the nuts of bold 5.

In the front view, they are hidden behind the outer wall and cannot be seen directly, so they are all shown with dotted lines.

Figure 2 is a plan view of Figure 1 seen from directly above, and shows the bold hole 4.
, and bold 5 are shown penetrating perpendicularly to the plane of the paper.

It is desirable that the number of bold holes is so that the force applied to the sphere is averaged, and therefore the number of bold holes is not necessarily limited to three as shown in this figure.

The dotted line 7 is the inner wall surface indicating the wall thickness at the joint surface.

Figure 3A shows the left half of the upper hemisphere in the cross-section of Figure 2, and is made so that it can be filled with mortar etc. without exposing the bolt hole 4 for fastening, the bolt 5, and the head of the bold. FIG. 3 is a cross-sectional view showing patterns of recesses 6 and the like.

Note that if this recess 6 cannot be provided because the wall thickness is thin, it may be removed to expose the bold.

The opening in FIG. 3 is a part of the wall of the hollow porous spherical wave-absorbing block according to the present invention.

That is, the Rolo cross section in FIG. 2 shows the right half of the upper hemisphere, and is an example of a case where reinforcing bars are inserted.

8 is a reinforcing bar that goes around the vicinity of cut 3 of the hemisphere.

9 is a reinforcing bar that goes around the vicinity of the hole 2 at the center of the spherical surface of the hemisphere, and 10 is a reinforcing bar that connects the reinforcing bars 8 and 9, and a hole 2 that is along the spherical surface and close to the cut 3 of the hemisphere. This is a reinforcing bar inserted between 2.

However, if the spherical block is small and has thick walls, it may be unreinforced.

0 is the center of the hemisphere.

Since the structure and manufacturing method are as explained above, for example, as is clear from Figures 2 and 3, the bold holes 4 for fastening the hemispheres are not shaded by the wall surface and are perfectly formed. Since it penetrates vertically, even if the length of the bold 5 is larger than the diameter of the hole 2, it can be easily passed through the bold hole and the tightening work can be performed easily.

Normally, when a structure similar to this is used, for example, to join two lattice bodies, etc., it is not possible to do so easily because the binding bold is larger than the mesh of the lattice.

The present invention can be easily made because the wall surface is spherical, and there is no particular need for a flange to connect the two hemispheres, and the wall of the hole 2 itself serves as a flange.
This point takes advantage of the characteristics of the sphere.

Furthermore, if it is particularly necessary for this purpose, suitable reinforcing bars can be inserted into the wall for reinforcement as shown in the opening in Figure 3.

In this way, the hollow-porous spherical wave-absorbing block manufactured by the manufacturing method of the present invention does not have a fastening flange that protrudes outside the sphere and impairs the properties of the sphere, and eliminates the need for welding or other efficient fastening methods. , can now be produced extremely easily and reliably.

As a result, the work process has been significantly improved, and materials, labor, construction time, and construction costs can be greatly reduced.

[Brief explanation of drawings]

Figure 1 is a front view of a spherical block with hollow holes. Figure 2 is a plan view of Figure 1 seen from directly above. FIG. 3 is a cross-sectional view of two locations in FIG. 2. 1... Porous hemisphere with a certain wall thickness. 2...A hole made in the wall of a hemisphere. 3...Cut of hemisphere. 4...Bold hole. 5...Bold. A: A spherical block with hollow holes.

Claims (1)

[Claims] 1 Among the holes of a hemisphere that have a number of circular holes raised toward the center in the wall of a hemisphere with a certain wall thickness, hole 2, which is close to the cut 3 of the hemisphere, has a hole in the wall of the hemisphere on the surface of the cut. It is characterized in that it is produced by joining two hollow porous hemispheres with a bold hole 4 installed in the vertical direction, passing the bold through the bold hole and tightening, and tightly joining the two hemispheres. A spherical wave-absorbing block with hollow holes.